![]() Reason is simple: With more number of cells filled up, cell digit possibilities get shorter and getting them easier. This is important.ĭigit possibilities for empty cells are enumerated ONLY WHEN NECESSARY.įor example, if you get a useful pattern and a hit after enumerating possible digits for just a few cells, continue exploring the hit to get further hits leaving enumeration behind for the time being. Such long list of digits CLUTTERS the view and hinders fluid movement of the eye over the game while searching for a useful pattern.Chance of getting a useful pattern from a 5 digit possibility in a cell is remote, and,.Writing long digit sets takes more time and effort,.Stop in a 9 cell major square when the rest of the empty cells would all have possible digits 5 or more. ![]() Once a few cells are enumerated in a zone, enumerating the rest gets easier. This is the possible digit subset or DS in the cell. So only the two digits (2, 4) are valid in cell R9C4. Eliminate repeated digits when considering digits of two or three zones together. Set union is technical, but this we do by common sense and do naturally. Unique set of digits in all these three together are, It is in three zones or areas - row R9, column C4 and bottom middle major square. Target is to get two-digit possibilities first. Select relatively more promising cells in a row, a column or a 9 cell major square (each a zone) to evaluate the smallest length of possible digits in the cells first. Reducing labor being an important objective, don't enumerate 5-digit possibilities or enumerate possible digits for ALL the cells. How to enumerate digits possible in an empty cell by DSA technique Then start enumeration of possible digits in empty cells again.īy this strategy cell we get the Cycle (1,5,8) in C1.īelow section explains in a bit of detail the process of enumerating digits possible in a cell.
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